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Optical pickup device

Inactive Publication Date: 2005-10-27
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because such a change develops a greater likelihood of unstable operation of the servo mechanism in the optical pickup device 501, there has been concern that precise operation of the servo mechanism cannot be assured.

Method used

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Examples

Experimental program
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Embodiment Construction

[0028] Referring now to the drawings, an optical pickup device according to an embodiment of the present invention will be described below.

[0029]FIG. 1 is an exploded perspective view showing an optical pickup device according to the embodiment of the present invention. FIG. 2 is a perspective view showing a process of assembling the optical pickup device. FIG. 3 is a perspective view showing a process of assembling the optical pickup device through using an adhesive. FIG. 4 is a perspective view showing an assembled optical pickup device. FIG. 5 is an enlarged view showing the principle components of an optical pickup device.

[0030] FIGS. 1 to 4 show a perspective view of the optical pickup device viewed from an upper side, and FIG. 5 is an enlarged view of the optical pickup device viewed from a lower side. It should be noted that, in this specification, the “upper side” and the “lower side” are defined for convenience to explain an optical pickup device.

[0031] An optical disc a...

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PUM

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Abstract

An optical pickup device comprises a photodetector for receiving laser light reflected from a disc and a housing in which the photodetector is housed, and the photodetector is directly attached to the housing. Through the use of the optical pickup device, occurrence of positional deviation of the photodetector can be suppressed, even under greatly changing temperatures.

Description

[0001] The entire disclosure of Japanese Patent Applications No. 2004-367433 and No. 2004-126806 including their specifications, claims, drawings, and abstracts are incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an optical pickup device in which a photodetector does not deviate from its proper position, even when undergoing a significant change in temperature. [0004] 2. Description of the Related Art [0005]FIG. 6 is an explanatory diagram showing an example of an optical pickup device, with FIG. 7 being an enlarged view showing the main section of the optical pickup device. [0006] A current is fed from an LDD (laser diode driver) 510 (shown in FIG. 6) to an LD (laser diode) 520, to thereby cause the LD 520 to output laser light. Here, the LD is an example component for emitting laser light and is also referred to as a light emitting element. The LDD 510 is a laser driving circuit which activates ...

Claims

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Application Information

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IPC IPC(8): G11B7/00G11B7/12G11B7/08G11B7/13G11B17/04
CPCG11B7/13
Inventor NABE, MITSUHIROTAKEUCHI, KENICHI
Owner SANYO ELECTRIC CO LTD